Problem: Makecert -sv MyCert.pvk -n”CN=MyCompanyCert” MyCert.cer -b01/01/2009 -e 12/31/2018 While executing the above command, sometimes we get the following error. Error: WrtieFile failed => 0×5<5> Solution: The solution for this is to run the command prompt in admin mode. This can be done by right-clicking on the cmd and selecting ‘Run as Administrator‘. Hope this helps ......